This read-only value is the index into cwdIfQosProfileTable identifying the quality-of-service attributes associated with this particular headend-side service entry, returning zero if that table isn't supported. Admins use it the same way as the SU-side equivalent, to trace a service instance to its governing QoS profile, but from the headend's perspective on the service. For example, an admin auditing headend service entries for a customer complaint would follow cwdIfHeServiceQosProfile to confirm the correct QoS profile is actually applied to that service.